Bootstrap/less/navbar.less

// NAVBAR (FIXED AND STATIC)
// -------------------------


// COMMON STYLES
// -------------

.navbar {
  overflow: visible;
  margin-bottom: @baseLineHeight;
}

// Gradient is applied to it's own element because overflow visible is not honored by IE when filter is present
.navbar-inner {
  padding-left:  20px;
  padding-right: 20px;
  #gradient > .vertical(@navbarBackgroundHighlight, @navbarBackground);
  .border-radius(4px);
  @shadow: 0 1px 3px rgba(0,0,0,.25), inset 0 -1px 0 rgba(0,0,0,.1);
  .box-shadow(@shadow);
}

// Navbar button for toggling navbar items in responsive layouts
.btn-navbar {
  display: none;
  float: right;
  padding: 7px 10px;
  margin-left: 5px;
  margin-right: 5px;
  .buttonBackground(@navbarBackgroundHighlight, @navbarBackground);
  @shadow: inset 0 1px 0 rgba(255,255,255,.1), 0 1px 0 rgba(255,255,255,.075);
  .box-shadow(@shadow);
}
.btn-navbar .icon-bar {
  display: block;
  width: 18px;
  height: 2px;
  background-color: #f5f5f5;
  .border-radius(1px);
  .box-shadow(0 1px 0 rgba(0,0,0,.25));
}
.btn-navbar .icon-bar + .icon-bar {
  margin-top: 3px;
}
// Override the default collapsed state
.nav-collapse.collapse {
  height: auto;
}


// Brand, links, text, and buttons
.navbar {
  color: @navbarText;
  // Hover and active states
  .brand:hover {
    text-decoration: none;
  }
  // Website or project name
  .brand {
    float: left;
    display: block;
    padding: 8px 20px 12px;
    margin-left: -20px; // negative indent to left-align the text down the page
    font-size: 20px;
    font-weight: 200;
    line-height: 1;
    color: @white;
  }
  // Plain text in topbar
  .navbar-text {
    margin-bottom: 0;
    line-height: 40px;
  }
  // Buttons in navbar
  .btn,
  .btn-group {
    .navbarVerticalAlign(30px); // Vertically center in navbar
  }
  .btn-group .btn {
    margin-top: 0; // then undo the margin here so we don't accidentally double it
  }
}

// Navbar forms
.navbar-form {
  margin-bottom: 0; // remove default bottom margin
  .clearfix();
  input,
  select,
  .radio,
  .checkbox {
    .navbarVerticalAlign(30px); // Vertically center in navbar
  }
  input,
  select {
    display: inline-block;
    margin-bottom: 0;
  }
  input[type="image"],
  input[type="checkbox"],
  input[type="radio"] {
    margin-top: 3px;
  }
  .input-append,
  .input-prepend {
    margin-top: 6px;
    white-space: nowrap; // preven two  items from separating within a .navbar-form that has .pull-left
    input {
      margin-top: 0; // remove the margin on top since it's on the parent
    }
  }
}

// Navbar search
.navbar-search {
  position: relative;
  float: left;
  .navbarVerticalAlign(28px); // Vertically center in navbar
  margin-bottom: 0;
  .search-query {
    padding: 4px 9px;
    #font > .sans-serif(13px, normal, 1);
    color: @white;
    color: rgba(255,255,255,.75);
    background: #666;
    background: rgba(255,255,255,.3);
    border: 1px solid #111;
    @shadow: inset 0 1px 2px rgba(0,0,0,.1), 0 1px 0px rgba(255,255,255,.15);
    .box-shadow(@shadow);
    .transition(none);

    // Placeholder text gets special styles; can't be bundled together though for some reason
    .placeholder(@grayLighter);

    // Hover states
    &:hover {
      color: @white;
      background-color: @grayLight;
      background-color: rgba(255,255,255,.5);
    }
    // Focus states (we use .focused since IE7-8 and down doesn't support :focus)
    &:focus,
    &.focused {
      padding: 5px 10px;
      color: @grayDark;
      text-shadow: 0 1px 0 @white;
      background-color: @white;
      border: 0;
      .box-shadow(0 0 3px rgba(0,0,0,.15));
      outline: 0;
    }
  }
}



// FIXED NAVBAR
// ------------

// Shared (top/bottom) styles
.navbar-fixed-top,
.navbar-fixed-bottom {
  position: fixed;
  right: 0;
  left: 0;
  z-index: @zindexFixedNavbar;
  margin-bottom: 0; // remove 18px margin for static navbar
}
.navbar-fixed-top .navbar-inner,
.navbar-fixed-bottom .navbar-inner {
  padding-left:  0;
  padding-right: 0;
  .border-radius(0);
}

// Fixed to top
.navbar-fixed-top {
  top: 0;
}

// Fixed to bottom
.navbar-fixed-bottom {
  bottom: 0;
}



// NAVIGATION
// ----------

.navbar .nav {
  position: relative;
  left: 0;
  display: block;
  float: left;
  margin: 0 10px 0 0;
}
.navbar .nav.pull-right {
  float: right; // redeclare due to specificity
}
.navbar .nav > li {
  display: block;
  float: left;
}

// Links
.navbar .nav > li > a {
  float: none;
  padding: 10px 10px 11px;
  line-height: 19px;
  color: @navbarLinkColor;
  text-decoration: none;
  text-shadow: 0 -1px 0 rgba(0,0,0,.25);
}
// Hover
.navbar .nav > li > a:hover {
  background-color: @navbarLinkBackgroundHover; // "transparent" is default to differentiate :hover from .active
  color: @navbarLinkColorHover;
  text-decoration: none;
}

// Active nav items
.navbar .nav .active > a,
.navbar .nav .active > a:hover {
  color: @navbarLinkColorHover;
  text-decoration: none;
  background-color: @navbarBackground;
}

// Dividers (basically a vertical hr)
.navbar .divider-vertical {
  height: @navbarHeight;
  width: 1px;
  margin: 0 9px;
  overflow: hidden;
  background-color: @navbarBackground;
  border-right: 1px solid @navbarBackgroundHighlight;
}

// Secondary (floated right) nav in topbar
.navbar .nav.pull-right {
  margin-left: 10px;
  margin-right: 0;
}



// Dropdown menus
// --------------

// Menu position and menu carets
.navbar .dropdown-menu {
  margin-top: 1px;
  .border-radius(4px);
  &:before {
    content: '';
    display: inline-block;
    border-left:   7px solid transparent;
    border-right:  7px solid transparent;
    border-bottom: 7px solid #ccc;
    border-bottom-color: rgba(0,0,0,.2);
    position: absolute;
    top: -7px;
    left: 9px;
  }
  &:after {
    content: '';
    display: inline-block;
    border-left:   6px solid transparent;
    border-right:  6px solid transparent;
    border-bottom: 6px solid @white;
    position: absolute;
    top: -6px;
    left: 10px;
  }
}
// Menu position and menu caret support for dropups via extra bottom-up class
.navbar-fixed-bottom .dropdown-menu {
  &:before {
    border-top: 7px solid #ccc;
    border-top-color: rgba(0, 0, 0, 0.2);
    border-bottom: 0;
    bottom: -7px;
    top: auto;
  }
  &:after {
    border-top: 6px solid #ffffff;
    border-bottom: 0;
    bottom: -6px;
    top: auto;
  }
}
// Dropdown toggle caret
.navbar .nav .dropdown-toggle .caret,
.navbar .nav .open.dropdown .caret {
  border-top-color: @white;
  border-bottom-color: @white;
}
.navbar .nav .active .caret {
  .opacity(100);
}

// Remove background color from open dropdown
.navbar .nav .open > .dropdown-toggle,
.navbar .nav .active > .dropdown-toggle,
.navbar .nav .open.active > .dropdown-toggle {
  background-color: transparent;
}

// Dropdown link on hover
.navbar .nav .active > .dropdown-toggle:hover {
  color: @white;
}

// Right aligned menus need alt position
// TODO: rejigger this at some point to simplify the selectors
.navbar .nav.pull-right .dropdown-menu, 
.navbar .nav .dropdown-menu.pull-right {
  left: auto;
  right: 0;
  &:before {
    left: auto;
    right: 12px;
  }
  &:after {
    left: auto;
    right: 13px;
  }
}